| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Litinsky James H. | Chairman and CEO, Director | 1700 S. PAVILION CENTER DRIVE, SUITE 800, LAS VEGAS | /s/ Elliot D. Hoops, Attorney-In-Fact for James H. Litinsky | 13 Jan 2026 | 0001831746 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MP | Common Stock | Award | $0 | +65,422 | +31% | $0.000000 | 277,766 | 12 Jan 2026 | Direct | F1 |
| transaction | MP | Common Stock | Award | $0 | +38,238 | +14% | $0.000000 | 316,004 | 12 Jan 2026 | Direct | F2 |
| transaction | MP | Common Stock | Tax liability | $2,498,471 | -38,238 | -12% | $65.34 | 277,766 | 12 Jan 2026 | Direct | F3 |
| transaction | MP | Common Stock | Tax liability | $1,719,487 | -26,316 | -9.5% | $65.34 | 251,450 | 12 Jan 2026 | Direct | F4 |
| transaction | MP | Common Stock | Tax liability | $2,237,082 | -35,053 | -14% | $63.82 | 216,397 | 13 Jan 2026 | Direct | F5 |
| holding | MP | Common Stock | 12,805,965 | 12 Jan 2026 | Held by James Henry Litinsky, Trustee of James Henry Litinsky Revocable Trust u/a/d 10/19/2011 | F6 |
| Id | Content |
|---|---|
| F1 | The securities reported are restricted stock units that vest in four annual installments beginning on the first anniversary of the grant date. Each restricted stock unit represents the contingent right to receive, upon vesting of the unit, one share of the issuer's common stock. |
| F2 | Represents the number of shares of Common Stock received upon vesting of restricted stock units with performance conditions award previously granted to the reporting person on February 23, 2023. Under the terms of this award, the restricted stock units with performance conditions cliff vest upon the conclusion of the three-year performance period from 01/01/2023 through 12/31/2025 and the certification of the Company's achievement of the pre-established performance conditions based on the relative total shareholder return of the Company's share price compared to the S&P 400 Index and S&P 400 Materials Index. |
| F3 | Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units with performance conditions that vested on January 12, 2026. |
| F4 | Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on January 12, 2026. |
| F5 | Represents shares withheld to satisfy tax withholding obligations applicable to the vesting of restricted stock units that vested on January 13, 2026. |
| F6 | James Litinsky as sole trustee of the James Henry Litinsky, Trustee of James Henry Litinsky Revocable Trust u/a/d 10/19/2011. |